Most people aren't very diligent with naming their tags and organizing their data. I am definitely guilty of this. Are there any data management services out t

Most people aren't very diligent with naming their tags and organizing their data. I am definitely guilty of this. Are there any data management services out there that can use some kind of semantic understanding to let you search through your own data? In essence, "google" my own personal collection of data? For example, I might make quick notes throughout the day and tag them with vague or maybe even incorrectly spelled tags. Can I type something like "note I wrote yesterday about dogs" and get correct results?